KR101925428B1 - Systems and methods for ofdm with flexible sub-carrier spacing and symbol duration - Google Patents

Abstract

There is provided an embodiment for supporting variable sub-carrier spacing and symbol duration for transmitting OFDM or other waveform symbols and associated cyclic prefixes. The symbol duration includes a useful symbol length and a cyclic prefix length associated therewith. The variable subcarrier interval and symbol duration are determined by parameters indicating the subcarrier interval, effective symbol length, and cyclic prefix length. An embodiment of a method by a network or network controller comprises constructing a plurality of multiple access blocks (MAB) types defining different combinations of subcarrier spacing and symbol duration for waveform transmission do. The method further comprises dividing the frequency and time planes of the carrier spectrum band into a plurality of MAB regions including frequency-time slots for the waveform transmission. The MAB type is then selected for the MAB region, and one MAB type is assigned to one corresponding MAB region.

Description

FIELD OF THE INVENTION The present invention relates to a system and a method for OFDM with flexible sub-carrier interval and symbol duration,

This application claims the benefit of U.S. Provisional Application No. 61 / 949,805 entitled " OFDM System with Flexible Frequency-Time Lattice " filed by Jianglei Ma et al. On Mar. 7, 2014, the entire contents of which are incorporated herein by reference, And U.S. Patent Application Serial No. 14 / 627,836 entitled "Systems and Methods for OFDM with Flexible Sub-Carrier Spacing and Symbol Duration", the entire contents of which are incorporated herein by reference.

The present invention relates to wireless communications, and in particular embodiments, relates to a system and method for transmitting different waveforms using flexible subcarrier spacing and symbol duration. In some specific embodiments, this waveform is an orthogonal frequency division multiplexed (OFDM) waveform with different parameters.

In conventional wireless standards, including standards for fourth generation (4G) and earlier wireless networks, standardized waveforms have been selected based on their suitability for general use. There are a variety of situations where different waveforms can provide better performance, but only standardized waveforms are available to address overall performance and implementation limitations. By using a single waveform, both the transmitter design and the receiver design can be simplified and the added computational complexity can be avoided. However, in order to provide improved performance in an ever-increasing deployment scenario, the use of a single waveform is a barrier to performance degradation. 4G networks use orthogonal frequency division multiplexed (OFDM) waveforms because of their many characteristics. In many scenarios, it may be advantageous to enable different OFDM waveform configurations for different channel conditions and / or different batch / application scenarios. Thus, the next generation wireless communication protocol is based on various criteria such as channel condition, traffic type, transmission mode, user equipment (UE) performance, or other factors, so that the most suitable waveform can be dynamically selected. adaptation of the air interface. As such, techniques and / or mechanisms for providing a flexible wireless interface that can be seamlessly adapted to a variety of waveforms to efficiently provide resilient radio performance under various channel conditions need.

According to a first aspect of the present invention, a method of a network controller supporting wireless communication is provided that defines different combinations of sub-carrier spacing and symbol duration for waveform transmission Constructing a plurality of multiple access blocks (MAB) types. The method of the network controller supporting the wireless communication further comprises dividing the frequency and time planes of the carrier spectrum band into a plurality of MAB areas including frequency-time slots for the waveform transmission. Then, at least two different MAB types from the constructed plurality of MAB types are selected for the MAB region.

According to a second aspect of the present invention, a method by a network component supporting wireless communication includes selecting a MAB region of a plurality of predetermined multiple access block (MAB) regions that divide the frequency and time planes of a carrier spectrum band And transmitting a signal on a frequency-time slot in the selected MAB region, according to the MAB type selected for the MAB region. The MAB type is among a plurality of predetermined MAB types. The method of the network component supporting wireless communication further includes reducing a bandwidth of the transmitted signal using a spectral filter according to the bandwidth of the MAB type.

According to a third aspect of the present invention, a method of a network device supporting wireless communication includes the steps of: selecting a frequency-time slot in a MAB region of a plurality of multiple access blocks (MAB) Signal and identifying a MAB type selected for the MAB region from among a plurality of defined MAB types and defining a subcarrier interval and symbol duration for the frequency-time slot of the MAB region. The method of the network device supporting wireless communication further comprises constructing a spectral filter having a bandwidth according to the MAB type, and detecting the signal using the spectral filter.

According to a fourth aspect of the present invention, a network controller supporting wireless communication includes at least one processor and a computer-readable non-volatile storage medium storing programming for execution by the at least one processor. The programming includes constructing a plurality of multiple access blocks (MAB) types that define different combinations of subcarrier spacing and symbol duration for waveform transmission and setting the frequency and time plane of the carrier spectrum band to a frequency for the waveform transmission - partitioning into a plurality of MAB regions including time slots. The network controller also selects, for the MAB area, at least two different MAB types from the established plurality of MAB types.

According to a fifth aspect of the present invention, a network component supporting wireless communication includes at least one processor and a computer-readable non-volatile storage medium for storing programming for execution by the at least one processor. Wherein the programming comprises: selecting a MAB region in a plurality of predetermined multiple access block (MAB) regions that divides the frequency and time plane of the carrier spectrum band and selecting a frequency-time (MAB) region within the MAB region according to the MAB type selected for the MAB region And a command for transmitting a signal on the slot. The MAB type is among a plurality of predetermined MAB types. The network component is further configured to reduce the bandwidth of the transmitted signal using a spectral filter according to the bandwidth of the MAB type.

According to a sixth aspect of the present invention, a network device supporting wireless communication includes at least one processor and a computer-readable non-volatile storage medium storing programming for execution by the at least one processor. The programming includes obtaining a signal on a frequency-time slot of a MAB region of a plurality of multiple access block (MAB) regions that divide the frequency and time plane of the carrier spectrum band, and obtaining a signal on the MAB region of the plurality of defined MAB regions Identifies the selected MAB type and defines the subcarrier interval and symbol duration for the frequency-time slot of the MAB region. The network device is further configured to construct a spectral filter having a bandwidth according to the MAB type, and to detect the signal using the spectral filter.

The foregoing has outlined rather broadly the features of one embodiment of the invention so that the detailed description of the invention that follows may be better understood. Additional features and advantages of embodiments of the present invention will be described below, which constitute the subject matter of the claims of the present invention. Skilled artisans appreciate that the disclosures and specific embodiments disclosed herein may be readily utilized as a basis for modifying or designing other structures or processes for carrying out the same purpose of the present invention. Those skilled in the art will appreciate that such equivalent constructions do not depart from the spirit and scope of the invention as set forth in the following claims.

BRIEF DESCRIPTION OF THE DRAWINGS For a more complete understanding of the present invention and the advantages thereof, reference is now made to the following description taken in conjunction with the accompanying drawings,
1 shows an embodiment of a wireless communication network.
Figure 2 shows a conventional OFDM waveform with fixed subcarrier spacing.
Figure 3 shows an OFDM waveform with a fixed symbol duration.
Figure 4 shows an embodiment of a multiple access block (MAB) type.
Figure 5 shows an embodiment of flexible subcarrier spacing and symbol duration allocation.
Figure 6 shows an embodiment of flexible subcarrier spacing and symbol duration allocation.
Figure 7 is a flow diagram of an embodiment of a method for providing flexible subcarrier spacing and symbol duration in accordance with different MAB types.
8 is a flow diagram of an embodiment of a method for accessing variable subcarrier intervals and symbol durations according to different MAB types.
Figure 9 illustrates a processing system that may be used to implement various embodiments.
Corresponding reference numerals and symbols in different drawings generally refer to corresponding parts unless otherwise stated. The drawings are shown to clearly illustrate the preferred embodiments of the embodiments and are not necessarily drawn to scale.

Hereinafter, the configuration and use of the presently preferred embodiment will be described in detail. It should be understood, however, that the present invention provides many applicable creative concepts that can be implemented in a wide variety of specific contexts. The particular embodiments described are intended to be illustrative of the specific ways in which the invention may be constructed and utilized and are not intended to limit the scope of protection of the invention.

Conventional OFDM systems use a fixed frequency (sub-carrier) interval and symbol duration to transmit each OFDM symbol and associated cyclic prefix. The sub-carrier spacing is fixed for the entire spectrum of a component carrier or a plurality of component carriers based on, for example, the highest level of user equipment (UE) mobility to be supported. The subcarrier spacing represents the spacing for each sub-carrier, which is an individual detectable frequency band (frequency band for transmission) within the carrier. Each sub-carrier may be assigned to one or more clients for communication. In addition, the OFDM symbol length is an individually detectable duration for transmitting information or data. The symbol length is the time taken to transmit the symbol and its associated CP. Some of the symbol lengths excluding the CP length, which are used to transmit symbols, are referred to herein as useful symbol lengths. The fixed subcarrier spacing and fixed symbol duration in conventional OFDM schemes also serve to limit cyclic prefix options. The cyclic prefix is added to the transmitted symbols (e.g., bits of information) and serves as a guard interval to eliminate inter-symbol interference. The length of the cyclic prefix is generally determined by the channel delay spread. Due to the fixed subcarrier spacing and the fixed OFDM symbol duration, the conventional OFDM scheme may not meet the spectrum efficiency and quality of service (QoS) requirements of the next generation network, There may be a need to support higher mobility, lower latency and overhead, more channel types, more deployment environments, and more transmission methods. Therefore, there is a need for a new OFDM scheme that can support more flexible air interfaces.

Embodiments of the present disclosure provide a method for supporting variable subcarrier intervals and symbol durations for transmitting OFDM symbols and associated cyclic prefixes. The symbol duration includes the effective OFDM symbol length and its associated cyclic prefix length. The variable subcarrier interval and the symbol duration are determined by the parameters indicating the subcarrier interval, the effective symbol length, and the cyclic prefix length. The parameter is referred to herein as a frequency-time primitive. This embodiment also allows variable subcarrier spacing and symbol duration granularity within the same carrier's spectral band. Carriers are spectrum allocations available for communication in a system and include a plurality of sub-carriers (usually frequency sub-bands) separated by a defined interval. For example, in Long Term Evolution (LTE), the carrier corresponds to a spectrum of a specific bandwidth such as 5, 10 and 20 gigahertz (GHz). In an embodiment of the present disclosure, a basic multiple access block (basic MAB) is defined as a unit of transmission that occupies a specified bandwidth for a carrier of the system and lasts for a specified duration. As described below, the variable subcarrier interval and the symbol duration allocation may include MAB regions having different subcarrier spacing and / or symbol duration. The variable frequency-time primitive may correspond to various MAB regions based on filtered OFDM (F-OFDM) transmission. As used herein, the term base MAB, or abbreviated MAB, represents the minimum subcarrier interval and symbol duration for resource allocation. Each MAB region includes a plurality of basic MABs, and different subcarrier spacing and symbol duration (effective symbol length and cyclic length) within different MAB regions may be supported. Aspects provided herein include variable OFDM frequency-time primitives that are dynamically selected to meet performance and efficiency requirements.

Figure 1 shows a network 100 for communicating data. The network 100 includes a base station or an access point (AP) 110 with a coverage area 101, a plurality of client mobile devices 120, and a backhaul network 130. The AP 110 may include any component capable of providing wireless access by establishing a mobile device 120 uplink (dashed) and / or downlink (dashed) connection. Examples of AP 110 include a base station, a NodeB, an enNH NodeB, a picocell, a femtocell, a Wi-Fi access point, and other wireless enabled devices do. The mobile device 120 may include any component capable of establishing a wireless connection with the AP 110, such as a user equipment (UE) or other wirelessly activated device. Backhaul network 130 may be any collection of components or components that allow data to be exchanged between AP 110 and a remote end (not shown). In embodiments, the network 100 may include a variety of other wireless devices, such as relays with wireless communication capabilities, low power nodes, and other user or client devices.

Figure 2 shows a conventional OFDM waveform with fixed subcarrier spacing that may be common in conventional long term evolution (LTE) and LTE-Advanced (LTE-A) networks. As shown, orthogonality in the frequency domain is maintained by using a uniform subcarrier spacing of 15 kilohertz (KHz) on all frequency-time planes of the carrier's spectral band.

3 is a diagram showing an OFDM waveform with a conventional fixed symbol duration (sum of effective symbol length and cyclic prefix length), which may be common to conventional LTE networks and LTE-A networks. As shown, the effective OFDM symbol length is fixed based on the common sampling frequency and subcarrier spacing. Thus, only a limited number of cyclic prefix configurations are supported. In one configuration, a normal cyclic prefix length is supported for frames of duration of 10 milliseconds (ms). This frame is divided into 10 transmission time intervals (TTI), and each TTI has a duration of 1 ms. The TTI is further divided into two slots each of 0.5 ms. Each slot is divided into seven OFDM symbols, the smallest non-divisible transmission unit. Each symbol has a length of 66.7 microseconds (μs), preceded by a normal cyclic prefix length. In another configuration, an extended cyclic prefix length is supported for the frame. In this configuration, the cyclic prefix length is 16.7 mu s.

Embodiments of the methods below support variable subcarrier spacing and symbol duration granularity within the same carrier spectrum band. This may help alleviate the problems associated with fixed subcarrier spacing and fixed symbol duration. In one embodiment, a basic multiple access block (MAB) is defined as a transmission unit that occupies a specified bandwidth and lasts for a specified duration. Different MAB sizes can be defined. For example, a smaller MAB may be used for a common channel (e.g., a synchronization channel, a common broadcast channel, etc.), and a larger MAB may be used by an individual channel (e.g., UE specific data channel). Multiple MAB types may be defined. For example, waveforms associated with different MAB types may have different subcarrier spacing, different effective OFDM symbol lengths, and / or different cyclic prefix lengths. Examples of MAB types are further described below. Depending on the embodiment, the time plane and frequency plane of the spectrum resource may be divided into different MAB regions, each MAB region having a predefined subcarrier interval and symbol duration The branch consists of a basic frequency-time slot of the same MAB type.

In another embodiment, the filtered OFDM waveform may be used to control interference between adjacent multiple access blocks (frequency-time slots with different subcarrier spacing and symbol duration). Since they have different subcarrier spacing and symbol durations, orthogonality can no longer be maintained in the frequency-time plane. In this case, a suitable digital filter is applied to the frequency band occupied by the MAB region to control out-of-band emission so that interference between the different MABs can not cause performance loss. Additionally, a guard tone may be used to roll off the digital filter edge. In the same or different embodiments, a filterbank multi-carrier (FBMC) waveform may be used to maintain orthogonality between different multiple access blocks. The FBMC waveform is described in U.S. Provisional Patent Application No. 14 / 035,161 entitled " System and Method for Weighted Circularly Convolved Filtering in OFDM-OQAM ", filed on September 9, 2013, Quot; Structure of Filter Bank Multi-Carrier (FBMC) Waveforms ", the entire contents of which are incorporated herein by reference.

In an embodiment of the OFDM waveform configuration, four MAB types are defined, including MAB type-1, MAB type-2, and MAB type-3, which are special MAB types. As used herein, the term "special MAB type" applies to local common transport channels, such as synchronization and broadcast channels, that require a larger subcarrier interval and a cyclic prefix, among defined MAB types Refers to a MAB type having a predetermined subcarrier spacing and a cyclic prefix. For example, a special MAB type may have the largest subcarrier spacing and the longest cyclic prefix among the defined MAB types. In one embodiment, a special MAB type is broadcast by a plurality of transmitters in a specific area, e.g., an area configured for radio access virtualization. The special MAB type has a relatively high tolerance for synchronization errors and is therefore suitable for supporting devices with high mobility and low complexity devices, e.g., capable of achieving high levels of synchronization accuracy. The special MAB type may be applied to control transmission and data transmission of devices that receive and / or transmit high-speed mobility devices and cooperative multipoint (CoMP) transmissions. MAB type-1 has the smallest subcarrier interval and the longest symbol duration (e.g., the longest cyclic prefix length), is suitable for low-speed mobility devices and is suitable for supporting large-scale CoMP transmission or broadcast services. MAB type-2 has an intermediate subcarrier spacing and a medium cyclic prefix length and is suitable for medium-speed mobility devices and is suitable for supporting small-scale CoMP transmission or non-CoMP (non-CoMP) transmission. MAB type-3 has the largest subcarrier spacing and the shortest cyclic prefix length and is suitable for communications requiring the fastest mobility devices, non-CoMP transmission, and very low latency. In other embodiments, more or fewer MAB types may be defined and used. The MAB type may have a variable size subcarrier spacing, an effective symbol length, a cyclic prefix length, or a combination thereof. For example, two different MAB types may have the same subcarrier spacing but different effective symbol lengths or cyclic prefix lengths, or they may have the same symbol or cyclic prefix length, but may have different subcarrier spacing Lt; / RTI > The size of the subcarrier interval, symbol or cyclic prefix length is defined for each MAB type to satisfy desired system criteria, conditions, or requirements (e.g., QoS).

The flexible subcarrier spacing and symbol duration allocation (e.g., corresponding to various MAB types) may be achieved by various OFDM parameters (or frequency-time primitives) such as subcarrier spacing, effective symbol length, cyclic prefix length, Lt; / RTI > In one embodiment, a plurality of available subcarrier spacing parameters (e.g.,? F, 2? F and 4? F), a plurality of effective symbol length parameters (e.g., T, T / 2, and T / 4) Prefix length parameters (e.g., CP, CP / 2, CP / 4, and CP / 2 + T / 4) may be defined. At this time, it is sufficient to define three basic parameter values (Δf, T, and CP) to set all the parameters. Other configurations may also be used in other embodiments.

Figure 4 shows an embodiment of the MAB type that can be used in OFDM communication, as described above. The MAB type includes MAB type-1 and symbol duration < RTI ID = 0.0 > CP + T < / RTI > For example, Δf can be defined as 15 KHz, CP can be defined as 4.7, 5.2, or 16.7 μs, and T can be defined as 66.7 μs. Alternatively, other suitable values for? F, CP, and T may be defined. MAB type also includes MAB type-2 with subcarrier spacing 2? F and symbol duration CP / 2 + T / 2, MAB type -3 with subcarrier spacing 4? F and symbol duration CP / 4 + T / 4, and A special MAB type or region with subcarrier spacing 4? F and symbol duration (CP / 2 + T / 4) + T / 4.

FIG. 5 illustrates an embodiment of a flexible subcarrier interval and symbol duration allocation that may be used in the OFDM scheme provided herein. Flexible subcarrier spacing and symbol duration allocation are established by defining MAB regions, where a basic multiple access block is defined in each region according to the MAB type. The MAB type is predefined as a corresponding subcarrier interval and symbol duration, as described above. In the present embodiment, the first MAB area includes a basic multiple access block according to MAB type-1 (basic MAB). The second MAB area includes a basic multiple access block according to MAB type-2, and further includes a basic multiple access block according to a special MAB type. The third MAB region includes a basic multiple access block according to MAB type-3. The size of the block within each area can be defined such that the areas can be divided up to the base slot without waste of time / frequency resources. The client receives the corresponding MAB in the corresponding area, using F-OFDM, which allows detection of sub-carriers with variable spacing for different MAB types.

FIG. 6 shows another embodiment of flexible subcarrier spacing and symbol duration allocation. In this embodiment, the frequency-time plane associated with the spectral band of the carrier is divided into MAB regions with at least one copy of the region in different regions of the plane. For example, a first MAB region (e.g., MAB Type-1) is defined in the upper left corner and the lower right corner of the frequency-time plane in the two regions of the plane. A second MAB region (e.g., MAB Type-2) is additionally defined in two different regions of the plane, as shown. This plane also includes the MAB type-3 region and the special MAB region. The client can access the corresponding area and block using F-OFDM. The embodiment of allocating flexible subcarrier intervals and symbol durations is merely an example, and MAB types, regions, and / or flexible subcarrier intervals and other configurations and symbol duration allocation configurations may be implemented using the implementations herein .

In one embodiment, a signaling mechanism is used to support the flexible subcarrier interval and symbol duration format described above. The signaling mechanism allows the UE to access the network via a special MAB, for example in the fixed and predefined positions of the synchronization channel and the broadcast channel, as described above. Network broadcasts may contain MAB zone configurations using special MABs. The MAB region allocation can be semi-fixed through signaling and carried by a special MAB. Alternatively, the MAB region allocation may be dynamically configured with signaling carried on a predefined MAB type, e.g., MAB Type-2 as described above. According to an embodiment, a mapping between at least one type of traffic / transmission and one or more corresponding MAB regions is predefined. For example, a particular application (e.g., machine-to-machine, M2M application) may be mapped to one MAB type (e.g., MAB type- based or grant-free access) may be mapped to another MAB type (e.g., MAB type-2). Certain types of devices and / or network configurations may also be served by a particular MAB type. For example, a high-speed train can be served by a special MAB type.

The schemes described above provide for flexible subcarrier spacing, symbol duration allocation, and MAB region based transmission. Variable waveform parameters for configuring multiple access blocks and MAB regions may also be dynamically selected to meet performance and efficiency requirements. This area may be partitioned to accommodate network characteristics, e.g., traffic load, traffic type, or some other. This approach meets varying QoS requirements, supports different transmission schemes, and provides efficient multiple access schemes to support UEs with different levels of mobility and complexity. This scheme also provides higher frequency efficiency, greater flexibility, and shorter latency than that provided by the static sub-carrier spacing and symbol duration allocation of conventional OFDM schemes.

FIG. 7 illustrates an embodiment of a method 700 for providing flexible subcarrier spacing and symbol duration allocation according to different MAB types. The method may be implemented by a network component such as a base station. In step 710, a plurality of MAB types with frequency-time slots are defined, wherein the frequency-time slots are of a MAB type having at least one of different subcarrier spacing, different effective symbol length, and different cyclic prefix length I have at least one. For example, the MAB type includes a special MAB type and at least one of the above-mentioned MAB type-1, MAB type-2, and MAB type-3. In step 720, a plurality of MAB regions are defined in the frequency-time plane of the spectrum band of the carriers allocated for transmission in the wireless network, wherein each one of the MAB regions is associated with at least one frequency- . As described above, examples of the MAB area are shown in Figs. 5 and 6. Fig. At step 730, at least one parameter of the MAB type is signaled to a network device (e.g., a UE). The parameter indicates at least one subcarrier interval, effective symbol length, and cyclic prefix length of the MAB type. The parameters include subcarrier spacing, effective symbol length, and / or cyclic prefix length of one or more MAB types.

FIG. 8 illustrates an embodiment of a method 800 for accessing flexible subcarrier intervals and symbol durations that are variable according to different MAB types. The method 800 may be implemented by a network device, which may be a transmitter or a receiver. Both the transmitter and the receiver need to transmit and receive signals according to the waveform corresponding to the selected MAB type. The transmitter may be a base station (BS), a wireless access point or node, or a UE. Similarly, the receiver may also be a BS or a UE. At step 810, information is received within a frequency-time slot of a predefined MAB region within the frequency-time plane of the carrier spectrum band allocated for transmission in the wireless network. The MAB region is one of a plurality of MAB regions in a frequency-time plane having a plurality of predefined MAB types. The frequency-time multiple-access block may include a subcarrier interval, an effective symbol length, and a cyclic prefix length according to a predefined MAB type associated with a MAB region or a dynamically defined MAB type (e.g., via signaling of parameters) I have. In step 820, the apparatus detects OFDM or other waveform (e.g., FBMC) symbols in the information by applying a frequency filter according to the subcarrier spacing. This is achieved by implementing the F-OFDM scheme according to the subcarrier interval of the MAB type.

9 is a block diagram of a processing system 900 that may be used to implement various embodiments. The processing system 900 may be part of a BS, a UE, or other network device. A particular device may use all or a subset of the components shown and the level of integration may vary from device to device. The apparatus may also include a plurality of instances of components such as a plurality of processing units, processors, memories, transmitters, receivers, and the like. The processing system 900 may include a processing unit 901 having one or more input / output devices, e.g., a speaker, a microphone, a mouse, a touch screen, a keypad, a keyboard, a printer, The processing unit 901 may include a central processing unit (CPU) 910, a memory 920, a mass storage device 930, a video adapter 940, and an I / O interface 960 connected to the bus. The bus may be one or more bus architectures of any of several types of bus architectures, including a memory bus, a memory controller, a peripheral bus, or a video bus.

CPU 910 may comprise any type of electronic data processor. The memory 920 may be any type of system memory such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), read- only memory, ROM), a combination thereof, or the like. In one embodiment, the memory 920 may include a ROM for use at boot time, a DRAM for a program, and data storage for use during execution of the program. Depending on the embodiment, memory 920 may be non-volatile. The mass storage device 930 may include any type of storage device that stores data, programs, and other information and is configured to allow data, programs, and other information to be accessible via the bus. The mass storage device 930 may include, for example, one or more of a solid state drive, a hard disk drive, a magnetic disk drive, an optical disk drive, or the like.

Video adapter 940 and I / O interface 960 provide an interface for connecting external input and output devices to the processing unit. As shown, examples of input / output devices include any combination of a display 990 connected to a video adapter 940 and a mouse / keyboard / printer 970 connected to an I / O interface 960. Other devices may be coupled to the processing unit 901, and additional or fewer interface cards may be used. For example, a serial interface card (not shown) may be used to provide a serial interface for the printer.

The processing unit 901 may also include one or more network interfaces 950 that may include a wired link, such as an Ethernet cable, and / or a wireless link to the access node or at least one network 980. The network interface 950 allows the processing unit 901 to communicate with the remote unit via the network 980. For example, the network interface 950 may provide wireless communication via one or more transmitter / transmit antennas and one or more receiver / receive antennas. In one embodiment, the processing unit 901 is coupled to a wide area network for data processing and communication with a remote device such as a local-area network or other processing unit, the Internet, or a remote storage facility.

While several embodiments are provided in the present disclosure, it is to be understood that the disclosed systems and methods may be embodied in many other specific forms without departing from the spirit or scope of the disclosure. These examples are to be considered as illustrative and not restrictive, and such intent is not to be limited to the details given herein. For example, various elements or components may be combined or may be integrated into another system, or some feature may be omitted or may not be implemented.
In an embodiment of the present invention, a method is provided for a network component supporting wireless communication, the method comprising:
Selecting an MAB region in a plurality of predetermined multiple access block (MAB) regions that divide the frequency and time planes of the carrier spectrum band;
Transmitting a signal on a frequency-time slot within the selected MAB region according to a MAB type selected for the MAB region, the MAB type being among a plurality of predetermined MAB types; And
And reducing the bandwidth of the transmitted signal using a spectral filter selected according to the bandwidth of the MAB type.
The method of claim 1,
Selecting a second MAB region of the plurality of predetermined MAB regions;
Transmitting a second signal on a frequency-time slot in the second MAB region according to a MAB type selected for the second MAB region, the MAB type of the second MAB region being in the predetermined MAB type, ; And
And reducing the bandwidth of the transmitted second signal using a second spectral filter according to the bandwidth of the second MAB type.
In another embodiment, the MAB type is a MAB type of frequency-time slot having the greatest sub-carrier spacing and the longest cyclic prefix length of the MAB type, Information associated with at least one of a regional common channel, a synchronization channel, a broadcast channel, a channel for an ultra-high mobility device, and a channel for coordinated multipoint (CoMP) And transmitting on the frequency-time slot of the MAB type.
In yet another embodiment, the MAB type is a first MAB type of frequency-time slot having the smallest sub-carrier spacing and the longest cyclic prefix length of the MAB type, The method includes providing information associated with at least one of a channel for a low mobility device, a channel supporting large scale cooperative multipoint (CoMP) transmission, and a channel for providing a broadcasting service from one or more transmitters to the first MAB Type of frequency-time slot. Optionally, in this embodiment, the MAB type comprises a second MAB type of frequency-time slot having a subcarrier spacing greater than the first MAB type and a cyclic prefix length longer than the first MAB type, A method by a network component supporting wireless communication includes communicating information associated with at least one of a channel for a medium mobility device and a channel supporting small cooperative multipoint (CoMP) transmission to a frequency of the second MAB type - transmitting on a time slot. In yet another embodiment, the MAB type comprises a frequency-time slot having a sub-carrier spacing greater than the first MAB type and the second MAB type and a cyclic prefix length shorter than the first MAB type and the second MAB type, The method comprising: providing a channel for a high-speed mobility device, a channel supporting non-cooperative multipoint (CoMP) transmission, and a channel for requesting a low latency And transmitting information associated with at least one of the first MAB type and the second MAB type on the frequency-time slot of the third MAB type.
In another embodiment of the present invention, a method 800 by a network device supporting wireless communication is provided, the method comprising:
Receiving (810) a signal on a frequency-time slot in a MAB region of a plurality of multiple access block (MAB) regions that divide the frequency and time planes of the carrier spectrum band;
Identifying a MAB type selected for the MAB region among a plurality of defined MAB types, defining a subcarrier interval and a symbol duration for frequency-time slots of the MAB region;
Constructing a spectral filter having a bandwidth according to the MAB type; And
And detecting (820) the signal using the spectral filter.
In one embodiment, a method by a network device supporting the wireless communication comprises:
Receiving a second signal on a second frequency-time slot in a second MAB region of the MAB region;
Identifying a second MAB type selected for the second MAB region, defining at least one of a second subcarrier interval and a second symbol duration for the second frequency-time slot;
Constructing a second spectral filter having subcarrier spacing according to the second MAB type; And
And detecting the second signal using the second spectral filter.
In yet another embodiment, a method by a network device supporting the wireless communication further comprises receiving a signaling of a parameter indicating at least one of the MAB type and the MAB area, At least one subcarrier interval, an effective symbol length, and a cyclic prefix length.
In yet another embodiment, the method of the network device supporting wireless communication further comprises receiving at least one MAB region of the MAB region mapped to at least one MAB type selected for the MAB region do.
In yet another embodiment, the MAB type comprises a special MAB type of frequency-time slot having the largest subcarrier interval and the longest cyclic prefix length of the MAB type, The method includes receiving information associated with at least one of a local common channel, a synchronization channel, a broadcast channel, a channel for ultra-fast mobility devices, and a channel for cooperative multipoint (CoMP) transmission on a frequency-time slot of the special MAB type .
In another embodiment of the invention, there is provided a network device supporting wireless communication, wherein the network device supporting the wireless communication comprises:
At least one processor;
And a computer-readable non-volatile storage medium for storing programming for execution by the at least one processor,
Obtaining a signal on a frequency-time slot of a MAB region of a plurality of multiple access block (MAB) regions that divide the frequency and time planes of the carrier spectrum band;
Identifying a MAB type selected for the MAB region among a plurality of defined MAB types, defining a subcarrier interval and a symbol duration for the frequency-time slot of the MAB region;
Construct a spectral filter having a bandwidth according to the MAB type;
And the signal is detected using the spectral filter.
In yet another embodiment, the programming includes additional instructions for obtaining signaling of a parameter representing at least one of the MAB type and the MAB region, the parameter including at least one sub-carrier interval of the MAB type, Length, and cyclic prefix length.
In yet another embodiment, the network device is a user equipment (UE) capable of communicating with a wireless network.
In another embodiment, the network device is a base station or a wireless access point of a wireless network.
In another embodiment of the invention, a network component supporting wireless communication is provided, wherein the network component supporting the wireless communication comprises:
At least one processor; And
And a computer-readable non-volatile storage medium for storing programming for execution by the at least one processor,
Selecting a MAB region of a plurality of predetermined multiple access block (MAB) regions that divide the frequency and time planes of the carrier spectrum band;
Transmitting a signal on a frequency-time slot within the MAB region according to a MAB type selected for the MAB region, wherein the MAB type is among a plurality of predetermined MAB types; And
And decreasing a bandwidth of the transmitted signal using a spectral filter according to the bandwidth of the MAB type.
In one embodiment,
Selecting a second MAB region of the MAB region;
Transmitting a second signal on a second frequency-time slot in the second MAB region according to a second MAB type selected for the second MAB region, wherein the second MAB type is in the predetermined MAB type -; And
And further decreasing the bandwidth of the transmitted second signal using a second spectral filter according to the bandwidth of the second MAB type.
In yet another embodiment, the network component supporting the wireless communication is a base station or a wireless access point of a wireless network.
The network component supporting the wireless communication is a user equipment (UE) capable of communicating with a wireless network.

In addition, the techniques, systems, subsystems, and methods, which may be separately or separately described in the various embodiments, may be combined or integrated with other systems, modules, techniques, or methods without departing from the scope of protection of the present disclosure. Other items shown or described as being connected, or directly connected, or communicating with each other may be electrically, mechanically, or indirectly connected, or may communicate via some interface, device, or intermediate component. Other examples of alterations, substitutions, and modifications may be made by those skilled in the art without departing from the spirit and scope of protection disclosed herein.

Claims (32)

A method by a network controller supporting wireless communication,
Constructing a plurality of multiple access blocks (MAB) types defining different combinations of sub-carrier spacing and symbol duration for waveform transmission;
Dividing a frequency and time plane of a carrier spectrum band into a plurality of MAB regions including a frequency-time slot for the waveform transmission; And
Selecting, for the MAB region, at least two different MAB types from the established plurality of MAB types;
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Wherein a first MAB region and a second MAB region of the plurality of MAB regions occupy different frequency regions of a carrier spectrum band in the same time slot and a first subcarrier interval of the first MAB region occupies a second frequency band region of a second MAB region, A method by a network controller supporting wireless communication that is two or four times the subcarrier interval. The method according to claim 1,
Further comprising placing at the transmitter of the network controller the frequency-time slot in the MAB region according to a symbol duration and a subcarrier interval of the at least two different MAB types selected for the MAB region A method by means of a network controller supporting. The method according to claim 1,
Wherein the MAB type is selected for the MAB region according to at least one channel type, transmission mode, propagation channel condition and quality of service (QoS) requirements associated with the MAB region, Method by controller. The method according to claim 1,
Signaling at least one sub-carrier interval, a useful symbol length, and a parameter indicative of a cyclic prefix length of the MAB type to one or more network devices after the selecting step Comprising a network controller supporting wireless communication. The method according to claim 1,
Signaling to the one or more network devices that one of the MAB regions has been mapped to at least one of the MAB types selected for the MAB region, the corresponding type of traffic or transport channel, and the corresponding communication channel after the selecting step The method further comprising the steps of: The method according to claim 1,
Wherein the MAB type comprises a MAB type of a frequency-time slot having a largest sub-carrier spacing and a longest cyclic prefix length of the MAB type. The method according to claim 1,
Wherein the MAB type comprises a first MAB type of frequency-time slot having the smallest sub-carrier spacing and the longest cyclic prefix length of the MAB type. 8. The method of claim 7,
Wherein the MAB type comprises a second MAB type of frequency-time slot having a subcarrier interval greater than the first MAB type and a cyclic prefix length longer than the first MAB type, How to do it. 9. The method of claim 8,
Wherein the MAB type comprises a third MAB type of frequency-time slot having a subcarrier spacing greater than the first MAB type and the second MAB type and a cyclic prefix length shorter than the first MAB type and the second MAB type, The method comprising the steps of: The method according to claim 1,
Wherein the waveform transmission is one of OFDM transmission, Filtered OFDM (F-OFDM) transmission, and Filter Bank Multi-Carrier (FBMC) transmission. Way. A network controller supporting wireless communication,
At least one processor; And
A computer readable non-volatile storage medium storing programming for execution by the at least one processor,
The above-
Construct a plurality of multiple access block (MAB) types defining different combinations of subcarrier spacing and symbol duration for waveform transmission;
Dividing the frequency and time planes of the carrier spectrum band into a plurality of MAB regions comprising frequency-time slots for said waveform transmission;
And for the MAB region, instructions for selecting at least two different MAB types from the established plurality of MAB types,
Wherein a first MAB region and a second MAB region of the plurality of MAB regions occupy different frequency regions of a carrier spectrum band in the same time slot and a first subcarrier interval of the first MAB region occupies a second frequency band region of a second MAB region, A network controller that supports wireless communications that is two or four times the subcarrier interval. 12. The method of claim 11,
Time slot in the MAB region in accordance with a subcarrier interval and a symbol duration of the at least two different MAB types selected for the MAB region in the transmitter of the network controller, A network controller that supports. 12. The method of claim 11,
Wherein the programming further comprises the step of signaling to one or more network devices a parameter indicative of at least one subcarrier interval, an effective symbol length, and a cyclic prefix length of the MAB type. delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete

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